Halogenindium phthalocyanine crystals

Abstract

An electrophotographic imaging member is characterized by a halogenindium phthalocyanine produced by dry milling and treating with an organic amine solvent.

What is claimed is: 
     
       1. A method of preparing a halogenindium phthalocyanine, comprising (A) dry grinding or milling a halogenindium phthalocyanine and (B) treating said halogenindium phthalocyanine with an organic amine solvent to produce a halogenindium phthalocyanine having improved sensitivity at a wavelength of infrared absorption. 
     
     
       2. The method according to claim 1, wherein said dry grinding or milling is conducted in a ball mill, a sand mill, a kneader or an attritor. 
     
     
       3. The method of claim 1, wherein said organic amine solvent is selected from the group consisting of triethanol amine, N,N-dimethylacetamide, dimethylformamide and diethylformamide. 
     
     
       4. The method of claim 1, wherein said organic amine solvent is N,N-dimethylformamide. 
     
     
       5. The method of claim 1, wherein step (A) comprises kneading or milling for a period from 24 to 100 hours. 
     
     
       6. The method of claim 1, wherein step (B) comprises treating said halogenindium phthalocyanine with an organic amine solvent in a proportion of solvent to halogenindium phthalocyanine of from 1/1 to 200/1. 
     
     
       7. The method of claim 1, wherein step (B) comprises treating said halogenindium phthalocyanine with an organic amine solvent in a proportion of solvent to halogenindium phthalocyanine of from 10/1 to 100/1. 
     
     
       8. The method of claim 1, wherein said halogenindium phthalocyanine is chloroindium phthalocyanine. 
     
     
       9. The method of claim 1, wherein step (A) comprises kneading or milling for a period from 72 to 96 hours. 
     
     
       10. A halogenindium phthalocyanine, produced by a method comprising (A) dry grinding or milling a halogenindium phthalocyanine and (B) treating said halogenindium phthalocyanine with an organic amine solvent, said halogenindium phthalocyanine characterized by a particle size in the range of 50-250 nm. 
     
     
       11. An electrophotographic imaging member comprising the halogenindium phthalocyanine of claim 10. 
     
     
       12. An electrophotographic imaging member comprising the halogenindium phthalocyanine of claim 10 and a TiO phthalocyanine (IV) pigment. 
     
     
       13. An electrophotographic imaging member comprising the halogenindium phthalocyanine of claim 10 and an hydroxygallium phthalocyanine (V) pigment.